public class subject3 {
    public static void main(String[] args) {
        String[]arr={"s","w","c"};     //定义一个给定的字符串数组
        int i;
        for (i=0;i<=2;i++) {           //数组下标逐增
            System.out.println(arr[i].toUpperCase());     //依次输出对应的大写字母
        }
    }
}
